Can a bad hpfp pump cause performance loss?

46m3csl · 03-21-2011, 07:21 PM

Can a bad hpfp pump cause performance loss?? The thing is that my car responds with a lot of power when i gently easy in on the throttle but if i slam it down its hell slow. Whats going on here

Gregxi · 03-21-2011, 07:51 PM

Really??

The more you step on the throttle the more fuel your engine requires,
so if you your fuel pump cannot keep up with the demand your performance suffers

ScaredOnce · 03-21-2011, 07:53 PM

That's actually the symptoms that I think I started with... Before the "longer" cranks...

Good luck! Keep us posted.

46m3csl · 03-21-2011, 07:56 PM

thanks man

46m3csl · 03-23-2011, 10:43 AM

anyone else had these symptons??? Was it the hpfp going bad

hpowders · 03-23-2011, 11:28 AM

Why don't you just do a HPFP search? Plenty of info. on this issue.

Verbiage · 03-23-2011, 12:13 PM

Unless you get the actual half/engine indicator showing reduced power then there is no official sign of HPFP failure, other than the regular symptoms. However, I did not notice a decrease in performance before mine went out, personally..

03-21-2011, 07:21 PM	#1
46m3csl Captain 121 Rep 774 Posts Drives: 335i Join Date: May 2010 Location: Rowland Heights iTrader: (0)	Can a bad hpfp pump cause performance loss? Can a bad hpfp pump cause performance loss?? The thing is that my car responds with a lot of power when i gently easy in on the throttle but if i slam it down its hell slow. Whats going on here
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03-21-2011, 07:51 PM	#2
Gregxi First Lieutenant 64 Rep 338 Posts Drives: 2014 535xi Join Date: Feb 2011 Location: MD iTrader: (0)	Really?? The more you step on the throttle the more fuel your engine requires, so if you your fuel pump cannot keep up with the demand your performance suffers
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03-21-2011, 07:53 PM	#3
ScaredOnce Very Important 20 Rep 450 Posts Drives: 335xi (e92) Join Date: Sep 2010 Location: PIT iTrader: (0) Garage List 2008 BMW 335xi (e92) [9.00] 2008 Pontiac G8 GT [4.00] 2002 Pontiac Grand ... [0.00] 2001 Cadillac, Eldo ... [0.00]	That's actually the symptoms that I think I started with... Before the "longer" cranks... Good luck! Keep us posted.
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03-21-2011, 07:56 PM	#4
46m3csl Captain 121 Rep 774 Posts Drives: 335i Join Date: May 2010 Location: Rowland Heights iTrader: (0)	thanks man
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03-23-2011, 10:43 AM	#5
46m3csl Captain 121 Rep 774 Posts Drives: 335i Join Date: May 2010 Location: Rowland Heights iTrader: (0)	anyone else had these symptons??? Was it the hpfp going bad
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03-23-2011, 11:28 AM	#6
hpowders 228i Fanatic 16 Rep 969 Posts Drives: BMW 228i and BMW 328i Join Date: Nov 2009 Location: USA iTrader: (0)	Why don't you just do a HPFP search? Plenty of info. on this issue.
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03-23-2011, 12:13 PM	#7
Verbiage Dismembered Member 3609 Rep 9,213 Posts Drives: F80 ZCP 6MT, R55 Clubman S 6MT Join Date: Jan 2010 Location: DMV iTrader: (6)	Unless you get the actual half/engine indicator showing reduced power then there is no official sign of HPFP failure, other than the regular symptoms. However, I did not notice a decrease in performance before mine went out, personally.. __________________ My delivery experience and beach photoshoot here.
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